基于AMESim液压系统管路动态特性的研究
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摘要
该文对液压系统管路的动态特性开展研究,理论推导了管路谐振频率、管路传递矩阵等主要参数的计算表达式。引入基于AMESim软件的时域、频域分析方法,通过对经典管路水锤现象进行时域、频域对比分析,证明AMESim软件能有效的模拟管路的实际情况,并能真实的反映管路在时域和频域内的动态特性。在此基础上,将该方法应用于液压伺服系统液压源与伺服阀之间长管路的动态特性分析当中,探索管长、管径及管厚与管路谐振频率及相位差之间的关系。分析结果表明:随着液压管道长度的增加,管路谐振频率显著降低,相位差增大,系统响应时间变长;随着管道内径的增加,管道压力幅值比增加,而谐振频率及相位差变化不大;管道厚度对系统动态特性影响较小。该研究可为液压系统管路设计提供参考。
This paper studied the dynamic characteristics of hydraulic system pipeline, the arithmetical expression of pipe line resonance frequency, the transfer matrix were deduced.Through analyzing the phenomenon of water hammer in time domain, frequency domain, introduced the analytical method in time domain and frequency domain based on AMESim software,proofed that AMESim software could effectively simulate the actual situation of the pipeline, and reflect the real line dynamic characteristics in time domain and frequency domain.On this basis, analyzed the dynamic characteristics of the long pipe between hydraulic source and servo valve of hydraulic servo system by using this method, explored the relationship between the length, diameter, thickness of pipeline and the resonance frequency and phase difference of it.Analysis results show that:With the increase of hydraulic pipe length, pipe resonant frequency decreased significantly,but the phase difference and system response time increased;With the increase of pipe diameter, pipe pressure amplitude ratio increased significantly,the resonance frequency and phase difference changed a little;Pipe thickness had smaller influence on the system's dynamic characteristics.The study can provide reference for hydraulic system pipeline design.
This paper studied the dynamic characteristics of hydraulic system pipeline, the arithmetical expression of pipe line resonance frequency, the transfer matrix were deduced.Through analyzing the phenomenon of water hammer in time domain, frequency domain, introduced the analytical method in time domain and frequency domain based on AMESim software,proofed that AMESim software could effectively simulate the actual situation of the pipeline, and reflect the real line dynamic characteristics in time domain and frequency domain.On this basis, analyzed the dynamic characteristics of the long pipe between hydraulic source and servo valve of hydraulic servo system by using this method, explored the relationship between the length, diameter, thickness of pipeline and the resonance frequency and phase difference of it.Analysis results show that:With the increase of hydraulic pipe length, pipe resonant frequency decreased significantly,but the phase difference and system response time increased;With the increase of pipe diameter, pipe pressure amplitude ratio increased significantly,the resonance frequency and phase difference changed a little;Pipe thickness had smaller influence on the system's dynamic characteristics.The study can provide reference for hydraulic system pipeline design.
引文
[1]丁问司,巫辉燕,陈丽娜,等.单相交流液压系统设计及特性分析[J].中南大学学报自然科学版,2010,41(4):1348-1353.
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[3]侯友山,石博强,肖成勇,等.铰接车辆转向系统液压管路动态特性[J].农业工程学报,2009,25(10):112-116.
[4]董春芳,朱玉杰,冯国红.基于AMESim的长管道液压系统动态仿真[J].煤矿机械,2010,31(1):73-75.
[5]齐晓燕,陆清.基于ANSYS的飞机液压管路系统流固耦合分析[J].液压与气动,2015,(10):71-74.
[6]于彦普.水锤问题的理论分析,计算及预防[J].天津建设科技,2000,(3):27-28.
[7]赵孝保.工程流体力学.第3版[M].南京:东南大学出版社,2012.
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[10]Wongputorn P,Hullender D A,Woods R L.Rational Polynomial Transfer Function Approximations for Fluid Transients in Lines[R].Honolulu:4thASME/JSME Joint Fluids Summer Engineering Conference,2003.
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[12]曾祥荣.液压噪声控制[M].哈尔滨:哈尔滨工业大学出版社,1988.
[2]姚静,孔祥东.锻造液压机管道动态特性仿真研究[J].机床与液压,2011,39(9):105-107.
[3]侯友山,石博强,肖成勇,等.铰接车辆转向系统液压管路动态特性[J].农业工程学报,2009,25(10):112-116.
[4]董春芳,朱玉杰,冯国红.基于AMESim的长管道液压系统动态仿真[J].煤矿机械,2010,31(1):73-75.
[5]齐晓燕,陆清.基于ANSYS的飞机液压管路系统流固耦合分析[J].液压与气动,2015,(10):71-74.
[6]于彦普.水锤问题的理论分析,计算及预防[J].天津建设科技,2000,(3):27-28.
[7]赵孝保.工程流体力学.第3版[M].南京:东南大学出版社,2012.
[8]王占林.飞机高压液压能源系统[M].北京:北京航空航天大学出版社,2004.
[9]焦宗夏.飞机液压能源管路系统的振动特性分析[J].北京航空航天大学学报,1997,(3):316-321.
[10]Wongputorn P,Hullender D A,Woods R L.Rational Polynomial Transfer Function Approximations for Fluid Transients in Lines[R].Honolulu:4thASME/JSME Joint Fluids Summer Engineering Conference,2003.
[11]Watton J,Tadmori M J.A Comparison of Techniques for the Analysis of Transmission Line Dynamics in Electrohydraulic Control Systems[J].Applied Mathematical Modelling,1988,12(5):457-466.
[12]曾祥荣.液压噪声控制[M].哈尔滨:哈尔滨工业大学出版社,1988.